JPH11243668A - Closed control device - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] To provide a sealed control device capable of promoting cooling of an electronic circuit and thereby prolonging the product life of the electronic circuit. SOLUTION: A centrifugal fan 41 is provided inside a housing 24 so that an air flow is generated inside the housing 24,
The air whose temperature has increased due to the heat generated by the smoothing capacitor 5, the semiconductor element 6, and the like flows in the axial direction toward the centrifugal fan 41, and the air sucked into the centrifugal fan 41
The air that flows in the centrifugal direction toward the inner wall surface of the housing 24 and hits the inner wall surface of the housing 24 diffuses in the direction along the inner wall surface and flows. Due to such a flow of air, heat transfer from the air to the housing 24 is promoted, and cooling can be promoted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed control device in which an electronic circuit is disposed in a sealed state inside a housing.

[0002]

Conventionally, there has been provided a closed-type control device in which an electronic circuit provided with, for example, a capacitor or the like in a housing is disposed in a sealed state. Since this is a configuration in which the inside and outside of the housing are shut off,
There is an advantage that the electronic circuit inside the housing can be protected from dust in the air outside the housing.

In such a closed-type control device, it is necessary to cool the heated electronic circuit as the electronic circuit inside the housing generates heat. The electronic circuit was cooled by natural heat radiation. Alternatively, a cooling device such as a fan is provided outside the housing, and the cooling device forcibly cools the housing, thereby cooling the air inside the housing and cooling the electronic circuit.

[0004] However, in such a conventional device, in both cases of natural heat radiation and forced heat radiation, the heat inside the housing depends on being transmitted to the upper wall portion of the housing by natural convection. Therefore, there is a problem that the cooling of the electronic circuit is not sufficiently performed, thereby shortening the product life.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a closed type control capable of promoting cooling of an electronic circuit and thereby prolonging the product life of the electronic circuit. It is to provide a device.

[0006]

According to a first aspect of the present invention, there is provided a sealed control device comprising: a housing provided integrally with a rotating electric machine; an electronic circuit disposed in a sealed state inside the housing; A configuration including a shaft-shaped rotating member that rotates integrally with the rotating shaft of the electric machine, and stirring means provided inside the housing and flowing and stirring air in the housing by being rotated by the rotating member. It has features.

According to the sealed control device having the above-described structure, when the electronic circuit generates heat in the housing provided integrally with the rotating electric machine, the heat generated in the electronic circuit is transmitted to the air in the housing. Further, the heat transmitted to the air is transmitted to the housing. Here, the air in the housing is flowed and agitated by the agitating means by the rotation of the rotating member, so that the flow of the air promotes the transfer of heat from the electronic circuit to the air, The transfer of heat from the air to the housing is promoted.

Thus, in a case where the rotating electric machine is integrally provided in the housing, when the electronic circuit generates heat in the housing, the heat generated in the electronic circuit is transmitted to the air in the housing. The heat transmitted to the air is transmitted to the housing. Here, since the air in the housing is flowed and agitated by the agitating means, the flow of the air facilitates the transfer of heat from the electronic circuit to the air, and the heat from the air to the housing. Communication is facilitated. Thereby, cooling of the electronic circuit can be promoted, and the product life can be prolonged. In particular, in this case, since the stirring member is rotated by the rotation of the rotating member of the rotating electric machine, it is not necessary to separately provide a dedicated driving unit when rotating the stirring unit. Can reduce the number of points,
Electricity bills can also be reduced.

According to a second aspect of the present invention, in the closed type control apparatus, the stirring means is provided with a part of the component of the rotation detecting means for detecting the rotation of the rotating shaft of the rotary electric machine. Things.

According to a third aspect of the present invention, there is provided the closed-type control device, wherein the electronic circuit is provided with a condenser, and the agitating means is constituted by a centrifugal fan capable of suctioning both sides, and the condenser is formed by a shaft of a rotating member. The centrifugal fan has a shroud disposed on the opposite side of the rotating member.

According to the closed-type control device having the above-described structure, even if the capacitor generates a relatively large amount of heat, it is possible to promote cooling by disposing the capacitor on the shaft end side of the rotating member, thereby extending the product life. Can be longer.

According to a fourth aspect of the present invention, in the closed type control device, the condenser is arranged such that a central axis thereof is located on the same axis as a central axis of the stirring means and is orthogonal to the central axis. It was established.

According to a fifth aspect of the present invention, in the closed type control device, the electronic control circuit includes a plurality of condensers in the electronic circuit, and the agitating means comprises a centrifugal fan capable of suctioning both sides. Are arranged on a vertical plane perpendicular to the center axis of the stirring means.

According to a sixth aspect of the present invention, in the closed-type control device, each of the capacitors is arranged in a tom-like configuration. The closed-type control device according to claim 7, wherein in the closed-type control device, the electronic circuit includes a centrifugal fan that includes a plurality of condensers and is capable of sucking agitating means on both sides. In which a stirrer is disposed on an arc centered at the center.

According to an eighth aspect of the present invention, in the closed type control apparatus, a control board is provided on the side of the stirring means opposite to the suction side. According to a ninth aspect of the present invention, in the closed type control device, a terminal block is provided on an outer peripheral side of the stirring means.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment in which the present invention is applied to an inverter-integrated motor will be described with reference to FIG. In the inverter device 22 as a closed-type control device, the mounting leg 3 is provided inside the housing 24.
A printed circuit board 4 positioned at a predetermined position is disposed in a sealed state, and a smoothing capacitor 5 and a semiconductor element as a switching element (for example, a switching element) are provided on the surface of the printed circuit board 4 (the right side in FIG. 1). Transistor) 6 is mounted.

Also, on the surface of the printed circuit board 4,
Although not shown, a diode constituting a rectifier circuit and the like are also mounted. Thus, the printed circuit board 4, the smoothing capacitor 5, the semiconductor element 6, and the like constitute an inverter circuit (rectifier circuit, inverter main circuit, and control circuit) 7 as an electronic circuit. In addition, in FIG.
On the right side, a centrifugal fan 41 as a stirring means is disposed so as to face the smoothing condenser 5.

The inverter-integrated motor 21 has an inverter device 22 and a motor (rotary electric machine) 23 integrally formed. An inverter circuit 7 including a printed circuit board 4, a smoothing capacitor 5, a semiconductor element 6, and the like is disposed in a sealed state inside a housing 24 of the inverter device 22, and the inverter circuit 7 includes a motor 2
3 is driven. In the housing 24, a hole 25a is formed in a predetermined portion of the right side wall 25 in FIG.
Are formed.

The motor 23 is composed of, for example, a three-phase induction motor, and has brackets 27 and 28 attached to both ends of a cylindrical frame 26 extending along the axial direction. Of these, the bracket 27 is in contact with the side wall 25 of the inverter device 22, and at the portion of the bracket 27 facing the hole 25 a of the side wall 25, the inner peripheral surface is flush with the hole 25 a. The hole 27a is formed such that The hole 25a of the side wall 25 and the hole 27a of the bracket form the shaft hole 29. A shaft hole 30 is formed in a predetermined portion of the bracket 28.

A stator 33 comprising a stator core 31 and a winding 32 wound around the stator core 31 is disposed on the inner peripheral side of the frame 26. A rotor 35 having a conductor (not shown) embedded in a rotor core 34 is rotatably accommodated on the inner peripheral side of the stator 33 as described later.

The rotating shaft 36 of the rotor 35 is
a and a small-diameter portion 36b as a rotating member formed to have a smaller diameter than the shaft main portion 36a. The small-diameter portion 36b of the rotating shaft 36 is supported by a bearing 37 provided on the bracket 27 so as to penetrate the shaft hole 29, and the shaft body 36a penetrates the shaft hole 30. Are supported by a bearing 38 provided on the bracket 28. Note that the small-diameter portion 36b
Of the shaft body portion 36 is slightly smaller than the shaft hole 29.
The outer diameter of “a” is formed slightly smaller than the shaft hole 30, and the rotating shaft 36 passes through the shaft holes 29 and 30, respectively, with almost no gap.

Also, the small diameter portion 36
A centrifugal fan 41 capable of suction on both sides as a stirring means is attached to the tip (shaft end) on the b side. The shroud 109 of the centrifugal fan 41 is provided on the non-axial end side of the small diameter portion 36b. And this centrifugal fan 41
Are rotated when the motor 23 is driven and the rotating shaft 36 is rotated.

Next, the operation of the above configuration will be described.
An AC voltage is applied to the inverter circuit 7 from the AC power supply,
When the inverter circuit 7 is driven, the smoothing capacitor 5 and the semiconductor element 6 generate heat accordingly. At this time, when an AC voltage is applied from the inverter circuit 7 to the motor 23 and the motor 23 is driven, the rotating shaft 36
Rotates, and the centrifugal fan 41 rotates in conjunction therewith.

Then, in the casing 24 of the inverter device 22, the air whose temperature has increased due to the heat generated by the smoothing capacitor 5 and the semiconductor element 6 flows in the axial direction toward the centrifugal fan 41 side. Flows axially also from the side wall 25 side toward the centrifugal fan 41 side, and the centrifugal fan 4
The air sucked into 1 flows radially around the rotation axis of the centrifugal fan 41. Thereby, the smoothing capacitor 5
And cooling of the semiconductor element 6 can be promoted.

According to the first embodiment, also in the inverter-integrated motor 21, the centrifugal fan 41 is provided inside the housing 24 so that air is generated inside the housing 24 by the centrifugal fan 41. Therefore, the heat transfer from the heated smoothing capacitor 5 or the semiconductor element 6 to the air is promoted, and the heat transfer from the air to the housing 24 is promoted. Thereby, cooling of the smoothing capacitor 5 and the semiconductor element 6 can be promoted, and the product life can be prolonged.

In particular, since the centrifugal fan 41 is mounted on the rotating shaft 36 of the motor 23 and the centrifugal fan 41 is rotated by the rotational force of the rotating shaft 36, the centrifugal fan 41 is rotated when the centrifugal fan 41 is rotated. This makes it possible to eliminate the need for a separate fan motor, thereby reducing the number of parts and the cost of electricity.

Further, since the diameter of the inverter device 22 on the rotating shaft 36 of the motor 23 is reduced, the amount of heat transmitted from the motor 23 to the inverter device 22 through the rotating shaft 36 can be suppressed.

Further, since the centrifugal fan 41 is made of a material having a small thermal conductivity, the amount of heat transmitted from the motor 23 to the inverter device 22 through the centrifugal fan 41 and the rotating shaft 36 can be suppressed. it can.

Next, a second embodiment of the present invention will be described with reference to FIG.
(Corresponding to claim 2). The same portions as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, different portions will be described.

In the second embodiment, a base 71 is provided in a fixed state inside the casing 24 of the inverter device 22. Is mounted with a sensor unit 73 made up of, for example, a Hall element, which constitutes a magnetic sensor 72 as rotation detecting means.

The small diameter portion 3 on the rotating shaft 36 of the motor 23
A centrifugal fan 41 capable of suction on both sides is attached to a tip end (axial end side) on the 6b side, and a shroud 109 is provided on a side surface (opposite axial end side) of the centrifugal fan 77 on the motor 23 side. A magnet 75 is provided on the shroud 109 along the circumferential direction so as to face the sensor section 73. The magnet 75 emits a magnetic field to the sensor unit 73.

When the motor 23 is driven and the rotating shaft 3
When the rotor 6 rotates, the magnet 75 rotates together with the centrifugal fan 41, and the magnetic field linking the sensor unit 73 changes accordingly. Thereby, in the sensor unit 73,
By detecting the change of the interlinking magnetic field, the rotation axis 3
6 can be detected. In the second embodiment, a magnet 75, which is a component of the magnetic sensor 72, is provided in the centrifugal fan 41.

According to the second embodiment, the same functions and effects as those of the first embodiment can be obtained. In particular, in the second embodiment, when configuring the centrifugal fan 41, the magnet 75, which is a component of the magnetic sensor 72, is disposed on the centrifugal fan 41, so that the number of components can be reduced accordingly.

Next, a third embodiment of the present invention will be described with reference to FIG.
4 and FIG. 4 (corresponding to claim 3).
The same portions as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, different portions will be described. In the third embodiment and thereafter, the illustration of the motor 23 is omitted.

In the third embodiment, a printed circuit board 101 is provided inside a housing 24 of an inverter device 22 in place of the inverter circuit 7 described in the first and second embodiments.
And an inverter circuit 104 including a semiconductor element 102 mounted on one side of the printed board 101 and a cylindrical smoothing capacitor 103 mounted on the other side of the printed board 101. I have.

In this case, the axial direction of the smoothing capacitor 103 is changed by the L-shaped terminal 105 to the printed circuit board 1.
01 is parallel to the plane direction. In addition, the semiconductor element 102 has an entire side surface (left side in FIGS. 3 and 4) so that heat is easily released from the housing 2.
4 is in contact with the inside.

In the motor 23, a centrifugal centrifuge capable of sucking both sides as a stirring means is provided at the tip end (shaft end side) of the small diameter portion 36b of the rotating shaft 36 so as to face the side surface of the smoothing condenser 103. The fan 106 is mounted. The centrifugal fan 106 has a configuration in which a blade 108 is attached to an outer peripheral portion of a cylindrical boss 107, and the blade 108 is held by an annular shroud 109.

Next, the operation of the above configuration will be described.
When an AC voltage is applied from an AC power supply to the inverter circuit 104 and the inverter circuit 104 is driven, the smoothing capacitor 103 and the semiconductor element 102 generate heat accordingly. At this time, the rotating shaft 36 rotates,
In conjunction with this, the centrifugal fan 106 rotates.

Then, in the housing 24 of the inverter device 22, the air whose temperature has increased due to the heat generated by the smoothing capacitor 103 and the semiconductor element 102 is supplied to the centrifugal fan 106.
It flows in the axial direction toward the side (see arrow J in FIG. 3).
The centrifugal fan 106 sucks air from the condenser 103 side and also sucks air on the inner wall surface side of the housing 24 (see arrow J2 in FIG. 3). The air sucked into the centrifugal fan 106 flows in the radial direction of the centrifugal fan 106 (FIG. 3).
Middle, see arrow K), and hit the inner wall surface of the housing 24 to diffuse and flow (see arrow L in FIG. 3). Thereby, cooling of the smoothing capacitor 104 and the semiconductor element 102 can be promoted.

According to the third embodiment, the same functions and effects as those of the first embodiment can be obtained. In particular, in the third embodiment, the smoothing condenser 103 is connected to the centrifugal fan 1.
Since the smoothing condenser 103 having a relatively large calorific value is provided on the intake side of No. 06, cooling can be promoted and the product life can be prolonged.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
(Corresponding to claim 4). The same parts as in the third embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, different parts will be described.

In the fourth embodiment, the smoothing capacitor 111 is mounted on the printed circuit board 101 such that the central axis is on the same axis as the central axis of the centrifugal fan 106 and is orthogonal to the central axis. .

According to the fourth embodiment, the same functions and effects as those of the third embodiment can be obtained. In particular, in the fourth embodiment, the smoothing condenser 111 is disposed so that the central axis is on the same axis as the central axis of the centrifugal fan 106 and is orthogonal to the central axis. Flows symmetrically, and the smoothing capacitor 1
11 can be further promoted.

Next, a fifth embodiment of the present invention will be described with reference to FIG.
(Corresponding to claim 5). The same parts as in the third embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, different parts will be described.

In the fifth embodiment, three smoothing capacitors 121 to 123 are mounted on the printed circuit board 101 so as to be on a plane perpendicular to the central axis of the centrifugal fan 106. I have.

According to the fifth embodiment, even when there are a plurality of smoothing capacitors 121 to 123, cooling of each of the smoothing capacitors 121 to 123 can be promoted.
Product life can be extended.

Next, a sixth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. 8 (corresponding to claim 6).
The same parts as in the fifth embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Hereinafter, different parts will be described.

In the sixth embodiment, four smoothing capacitors 131 to 134 are mounted on the printed circuit board 101 in a tomographic pattern on a plane perpendicular to the central axis of the centrifugal fan 106. ing.

According to the sixth embodiment, the same functions and effects as those of the fifth embodiment can be obtained. Next, a seventh embodiment of the present invention will be described with reference to FIG.

The same parts as those in the fifth embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Hereinafter, different parts will be described. In the twelfth embodiment, the printed circuit board 101
Further, three smoothing capacitors 141 to 143 are mounted on the printed circuit board 101 so as to form an arc centered on a predetermined portion on the central axis of the mixed flow fan 106.

According to the seventh embodiment, the same functions and effects as those of the fifth embodiment can be obtained. Next, an eighth embodiment of the present invention will be described with reference to FIG. 10 (corresponding to claim 8). The same parts as in the third embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, different parts will be described.

In the eighth embodiment, the centrifugal fan 1
06, the control board 16 through which the rotating shaft 36 has passed
1 is provided. According to the eighth embodiment, the same functions and effects as those of the eighth embodiment can be obtained. In particular, in the eighth embodiment, the cooling of the control board 161 can be promoted by the flow of the air sucked by the centrifugal fan 106.

Next, a ninth embodiment of the present invention will be described with reference to FIG.
1 will be described (corresponding to claim 9). The same parts as in the third embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, different parts will be described.

In the ninth embodiment, the centrifugal fan 1
A terminal block 171 to which, for example, a power cord is connected is provided on the outer peripheral side of 06. According to the ninth embodiment,
The same functions and effects as those of the third embodiment can be obtained. In particular, in the ninth embodiment, the cooling of the terminal block 171 can be promoted by the flow of the air discharged from the centrifugal fan 106.

[0055]

As is apparent from the above description, according to the sealed control device of the first aspect, the air in the housing flows inside the housing in which the electronic circuit is disposed in a sealed state. -Since the stirring means for stirring is provided, the flow of air in the housing by the stirring means promotes the transfer of heat from the electronic circuit to the air and the transfer of heat from the air to the housing. become. Thereby, cooling of the electronic circuit can be promoted, and the product life can be prolonged.

According to the closed-type control device of the first aspect,
Since the rotating member rotates inside the housing provided integrally with the rotating electric machine and in which the electronic circuit is disposed in a sealed state, stirring means for flowing and stirring air in the housing is provided. By means of the flow of air in the enclosure by means
The transfer of heat from the electronic circuit to the air is promoted, and the transfer of heat from the air to the housing is promoted. Thus, in a configuration in which the rotating electric machine is integrally provided in the housing, an agitating means for flowing and agitating the air in the housing is provided inside the housing in which the electronic circuit is disposed in a sealed state. Therefore, the flow of air in the housing by the stirring means promotes the transfer of heat from the electronic circuit to the air, and the transfer of heat from the air to the housing. Thereby, cooling of the electronic circuit can be promoted, and the product life can be prolonged. In particular, since the stirring member can be rotated by rotating the rotating member of the rotating electric machine, it is not necessary to separately provide a dedicated driving means when rotating the stirring device, and the number of parts is reduced accordingly. In addition, the cost of electricity can be reduced.

According to the closed-type control device of the second aspect,
Since a part of the components of the rotation detecting means for detecting the rotation of the rotating shaft of the rotary electric machine is provided in the stirring means, the number of parts can be reduced in configuring the stirring means.

According to the closed-type control device of the third aspect,
The electronic circuit is equipped with a condenser, and the stirring means is composed of a centrifugal fan or a mixed flow fan, and the condenser is arranged on the suction side of the stirring means. , Cooling can be promoted and the product life can be prolonged.

According to the closed-type control device of the fourth aspect,
Since the condenser is disposed so that its central axis is located on the same axis as the central axis of the stirring means and is orthogonal thereto, cooling of the condenser can be further promoted.

According to the closed-type control device of the fifth aspect,
Since the electronic circuit is provided with a plurality of condensers, the stirring means is constituted by a centrifugal fan or a mixed flow fan, and each condenser is disposed on a vertical plane perpendicular to the center axis of the stirring means on the suction side of the stirring means. Even when there are a plurality of capacitors, cooling of each of the capacitors can be promoted, and the product life can be prolonged.

According to the closed-type control device of the sixth aspect,
Since the capacitors are arranged like a tom, even when there are a plurality of capacitors, cooling of each of the capacitors can be promoted, and the product life can be extended.

According to the closed-type control device of the seventh aspect,
The electronic circuit is provided with a plurality of condensers, and the stirring means is constituted by a centrifugal fan or a mixed flow fan, and each condenser is disposed on an arc centered on the center of the stirring means on the suction side of the stirring means. Even if there are such capacitors, cooling of each of the capacitors can be promoted, and the product life can be prolonged.

According to the sealed control device of the eighth aspect,
Since the control board is provided on the side opposite to the suction side of the stirring means, the control board can also be cooled. According to the closed-type control device of the ninth aspect, since the terminal block is provided on the outer peripheral side of the stirring means, the terminal block can also be cooled.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a diagram showing a third embodiment of the present invention.

FIG. 4 is a plan view

FIG. 5 is a diagram showing a fourth embodiment of the present invention.

FIG. 6 is a diagram showing a fifth embodiment of the present invention.

FIG. 7 is a diagram showing a sixth embodiment of the present invention.

FIG. 8 is a rear view.

FIG. 9 is a diagram showing a seventh embodiment of the present invention.

FIG. 10 is a diagram showing an eighth embodiment of the present invention.

FIG. 11 is a plan view showing a ninth embodiment of the present invention.

[Explanation of symbols]

In the drawings, 1 is an inverter device (closed control device), 2 is a housing, 7 is an inverter circuit (electronic circuit), 8 is a centrifugal fan (stirring means), 22 is an inverter device (closed control device), and 23 is Motor (rotary electric machine), 24 is a housing, 36 is a rotating shaft, 36b is a small diameter portion (rotating member), 41 is a centrifugal fan (stirring means), 51 is a centrifugal fan (stirring means), 54
Is a shaft (rotating member), 55 is a rotating shaft, 61 is a centrifugal fan (stirring means), 64 is a cylinder, 72 is a magnetic sensor (rotation detecting means), 77 is a centrifugal fan (stirring means), and 82 is an inverter device. (Sealed control device), 83 is a housing, 84 is a motor (rotary electric machine), 85 is a frame (outer frame), 86 is a boundary wall (boundary wall portion), 87 is a rotating shaft, 89 is an axial fan ( Stirring means), 90 is a ventilation hole, 91 is a rotating shaft, 103
Is a smoothing capacitor, 104 is an inverter circuit (electronic circuit), 106 is a mixed flow fan (stirring means), 111 is a smoothing capacitor, 121 to 123 are smoothing capacitors, 131
Reference numerals 134 to 134 denote smoothing capacitors, 141 to 143 denote smoothing capacitors, 161 denotes a control board, and 171 denotes a terminal block.

Claims (9)

[Claims] A housing integrally provided with the rotating electric machine; an electronic circuit disposed in a sealed state inside the housing; and a shaft-shaped rotating member that rotates integrally with a rotating shaft of the rotating electric machine. And a stirrer provided inside the housing and flowing and stirring air in the housing by being rotated by the rotating member. 2. The closed-type control according to claim 2, wherein a part of a substrate part of a component of the rotation detecting means for detecting the rotation of the rotating shaft of the rotary electric machine is disposed in the stirring means. apparatus. 3. The electronic circuit includes a condenser, the agitating means includes a centrifugal fan capable of suctioning on both sides, and the condenser is disposed on a shaft end side of the rotating member;
3. The sealed control device according to claim 1, wherein a shroud of the centrifugal fan is disposed on a side opposite to the shaft end of the rotating member. 4. The capacitor according to claim 3, wherein a center axis of the capacitor is located on the same axis as a center axis of the rotating member and is orthogonal to the center axis. Closed control device. 5. The electronic circuit includes a plurality of condensers, the agitating means includes a centrifugal fan capable of suctioning on both sides, and the condensers are disposed on the shaft end side of the rotating member, and 3. The sealed control device according to claim 1, wherein the control device is disposed on a vertical plane perpendicular to the central axis. 6. The closed-type control device according to claim 5, wherein each of the capacitors is arranged in a tomography. 7. The electronic circuit includes a plurality of condensers, the agitating means includes a centrifugal fan capable of suctioning on both sides, and each condenser is provided at an axial end of the rotating member, 3. The closed-type control device according to claim 1, wherein the control device is arranged on an arc centered on the center. 8. The closed-type control device according to claim 1, wherein a control board is provided on a side opposite to the shaft end of said rotating member. 9. The sealed control device according to claim 1, wherein a terminal block is provided on an outer peripheral side of the stirring means.